What is iomdisk?

Iomdisk.sys is a Windows driver. A driver is a small software program that allows your computer to communicate with hardware or connected devices. This means that a driver has direct access to the internals of the operating system, hardware etc. The free file information forum can help you determine if iomdisk.sys is a Windows system file or if it belongs to an application that you can trust.

Run a free scan to check for iomdisk drivers in need of updating

Iomdisk.sys file information

The process known as Iomega Disk Filter Driver or Iomega Devices Disk Filter Services belongs to software Microsoft® Windows NT® Operating System or Iomega Devices Disk Filter Services by Iomega (

Description: Iomdisk.sys is not essential for the Windows OS and causes relatively few problems. Iomdisk.sys is located in the C:\Windows\System32\drivers folder. Known file sizes on Windows 10/8/7/XP are 30,258 bytes (75% of all occurrences), 50,898 bytes or 32,658 bytes. 
The driver can be started or stopped from Services in the Control Panel or by other programs. The program has no visible window. It is not a Windows core file. iomdisk.sys appears to be a compressed file. Therefore the technical security rating is 28% dangerous, however you should also read the user reviews.

Recommended: Identify iomdisk.sys related errors

Important: Some malware disguises itself as iomdisk.sys, particularly when not located in the C:\Windows\System32\drivers folder. Therefore, you should check the iomdisk.sys process on your PC to see if it is a threat. We recommend Security Task Manager for verifying your computer's security. This was one of the Top Download Picks of The Washington Post and PC World.


User Comments

I have a file size (not on disk) of 32,658
omega driver for ZIP disk drive
  Rob Stuart  
causes random crashes
Part of Windows which opens your built in wallpaper/screensavers
  precious pony  
renamed it and got blue screen. Had to boot to Linux CD to change the name back.
Driver for iomega stuff - deleting it can stop vista booting
it makes my winXPproSP2 hang up on boot. i hate this thingie! make it go away!!!!
If renamed will cause boot up blue screen.
  Roger Rose  

Rating chart

Summary: Average user rating of iomdisk.sys: based on 6 votes with 8 user comments. 3 users think iomdisk.sys is essential for Windows or an installed application. One user thinks it's probably harmless. 2 users suspect danger. 2 users don't grade iomdisk.sys ("not sure about it").

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Best practices for resolving iomdisk issues

A clean and tidy computer is the key requirement for avoiding problems with iomdisk. This means running a scan for malware, cleaning your hard drive using cleanmgr and sfc /scannow, uninstalling programs that you no longer need, checking for Autostart programs (using msconfig) and enabling Windows' Automatic Update. Always remember to perform periodic backups, or at least to set restore points.

Should you experience an actual problem, try to recall the last thing you did, or the last thing you installed before the problem appeared for the first time. Use the resmon command to identify the processes that are causing your problem. Even for serious problems, rather than reinstalling Windows, you are better off repairing of your installation or, for Windows 8 and later versions, executing the DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To help you analyze the iomdisk.sys process on your computer, the following programs have proven to be helpful: Security Task Manager displays all running Windows tasks, including embedded hidden processes, such as keyboard and browser monitoring or Autostart entries. A unique security risk rating indicates the likelihood of the process being potential spyware, malware or a Trojan. Malwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

iomdisk.sys [all]